Photoshop postcards OUG405

We were given a brief where we had to go round collage and take some pictures that involved a shape that we were given, I was given a cross. The postcard images didn't necessarily have to perfectly represent the shape so I chose to be quite abstract with my images.

 Im pretty happy with the way my images have turned out, Im not too sure why the middle image has some weird grey marks on it, this isn't on the the photoshop document or the print out so I think its fine.